Dyeing process.



iL J, RAH.

DYEING PROCESS.

xvbmtvlumr; FILED MAR. 4, 11x14 1,1 31,983, Patented Mar. 9, 191-5.

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affor e ys ton, New Jersey,

UNITED STATES PATENT OFFICE.

ALBERT J'. BAU, OF CLIFTON, NEW JERSEY.

DYEING PROCESS.

Specification of Letters Patent.

Patented Mar. 9, 1915.

Application filed March 4,. 1914. Serial No. 822,315.

To all whom it may concern v Be it known that I, ALBERT J. RAU, a citizen of the United States, residing at Clifhave invented certain new and useful Improvements in Dyeing Procasses, of which the followine is a clear, full, and exact description.

This invention relates to dyeing processes and particularly to such processes as are used for dyeing fabrics.

A principal object of the invention is to provide a simple process which will insure a uniform dyeing effect throughoutthe entire length of the material dyed.

A further object of the invention 18 to effect the dyeing in such a. way that the dye liquor of the bath comes di ectly in contact with the surface of the fabric, first on one side and then on the other, so that the dye liquor is forced through the fabric. first in one direction and then in the other.

Further objects of the invention will appear more fully hereinafter.

The drawing illustrates apparatus which may be used in carrying out my process.

Figure 1 is a longitudinal vertical section; Fig. 2 is a transverse vertical section through the apparatus shown in Fig. 1; Fig. 3 is a detail of a portion of a drum constituting a. feature of the apparatus; Fig. 4 is a detail showing a portion of the rim of the drum; Figs. 3 and 4 are upon an enlarged scale.

The apparatus by means of which my process is most conveniently carried out preferably comprises a vat 1 having end walls or heads 2 between. which I prefer to mount two rotatable drums 3 and 1. These drums are preferably constructed on a plurality of s iders5 having hubs 6 by means of which hey are attached rigidly to the shafts 7. The ends of the drums are open and the length of the drums is such that each drum substantially bridges the distance between the heads 2; in this way the extremities of the drum substantially close off communication between the space around the drums and the interior of the drums adjaccnt the heads. The heads 2 are preferably provided with openings 8 of segmental form, and the vat is formed with false heads 9 which are incl-used so that conduits 10 are formed at each end of the vat communieating with the interior of the drums through the openings 8. In the lower part of the heads 2, openings 11 are formed in which are mounted impellers 12 attached to .wire. The shafts 7 are preferably provided with belt pulleys l9 and respectively which are connected by a horizontal belt 21 so that when'pulley 20 isrotated by a driving belt 22, pulley 19 will also be rotated Adjacent each pulley a clutch '23 iszprovided corresponding to each drum. When one of the clutches 23 is thrown in, its corresponding pulley will be rotated so as torotate its corresponding drum r In carrying out the process, we fabric to be dyed is Wrapped in a coil 24 "upon one ofthe drums. This maybe accomplished while unwrapping it from a'roller 25 supported on bearings 26 on the vat. As illustrated, this coil is formed on the right hand drum in Fig. 2. The clutch of the right hand drum is then thrown open and the corresponding clutch of the left hand drum is closed. The end of the web is then attached in anysuitable manner such as by pinning it to the surface of the left hand drum and the belt 22 is then driven so as to rotate the left hand drum in the direction of the arrow. This winds the web from the" right hand drum to the left hand drum so that the layers of the web on the right hand drum pass over and form a coil oflayers on the left hand drum. While this is taking place, the shaft 13 is rotated. so that the impellcrs 12 which are of opposite pitch draw the dye liquor from the ducts 10 into the space 27 under and surrounding the drum. This produces a circulation in the direction indicated by the arrows, and produces an" excess of hydrostatic pressure on the outer sides of the drums whichforces the dyer liquor through the layers of the fabric-into the interior of the drums. has completely liquor is the same as'before. In this way it 1 After-the web. passed from one drum to the other, it is passed back again in the same will be seen that the entire length of the web on one side is subjected to direct contact with the bath under hydrostatic pressure, forcing the dye liquor through the fabric from that side. On account of the fact that the web is wrapped in opposite directions on the two drums, it will be seen that the entire length of both sides of the cloth will be brought directly in contact with the bath and subjected to hydrostatic pressure, forcing the dye through the fabric. In this way a very efficient and uniform dyeing effect results.

During the dyeing process the drums and the web of fabric are completely immersed in the bath of dye liquor, the level of which is indicated at line 28. The hydrostatic pressure forces the dye liquor through the entire mass of the web on each drum, passing. through the layers in succession. Of course the layers of the fabric onone drum are arranged in reverse order with respect to the layers of fabric on theother drum. While I prefer to carry out the process by forcing the dye liquor through a plurality of layers of the fabric,-it is evident that in practising the invention a single web of material could be guided around the drums so that the sides of the material would be exposed on the outside of the drums in succession, in which case the dye liquor would be forced through a single layer of the material in one direction first, and then in the other direction.

It is understood that the embodiment of my invention described above is only one of the many embodiments or vforms the invention may take, and I do not wish to be limited in the practice of the invention nor in my claims to the particular embodiment described.

What I claim is:

1. The process of dyeing a fabric, which consists in forming a mass of a plurality of layers of the fabric arranged adjacent to each other, forcing the dye liquor through the said layers in succession in, a certain direction, forming a second mass of the same fabric with the same layers arranged in reverse order, and forcing the dye liquor through the last named layers in succession in the same direction as before.

2. The process of dyeing a fabric, which consists in forming amass of a plurality of layers of the fabric arranged adjacent to each other, forcing the dye liquor through the said layers in succession in a certain direction, forminga second mm of the same fabric with the same layers arranged in reverse'oi'der, forcing the dye liquor through the last named layers in succession in the same direction as before, and passing the fabric from one of said masses to the other while the dye liquor is being forced through said layers.

3. The process of dyeing afabric, which consists in forming an open coil of layers of the fabric, forcing the dye liquor through the said layers in succession in a certain direction, forming a second coil of the same fabric of layers coiled in a reverse direction with respect to said first coil, and forcin' the dye liquor through the second namet coil in the same direction as before.

4. The process of dyeing a fabric, which consists in wrapping the fabric into a coil, forcing a dye liquor through the layers of said coil in succession, wrapping said web intoa second coil coiled in a reverse direction with respect to said first coil, forcing the dye liquor through the layers .of the second coil in succession so that the direction of movement of the liquor with respect to both coils is the same, and maintaining the coils immersed in a bath of the dye liquor.

5. The process of dyeing a fabric, which consists in wrapping the fabric into a coil, forcing a dye liquor through the layers of said coil in succession, wrapping said web into a second coil coiled in a reverse direction with respect to said first coil, forcing the dye liquor through the layers of the second coil in succession so that the direction of movement of the liquor with-respect to both coils is the same, maintaining the coils immersed in a bath of the dye liquor, and circulating the dye liquor.

6. The process of dyeing a fabric which consists in passing a wound u web of the fabric through a dye bath, sub ecting the so Wound fabric to hydrostatic pressure in said bath on one side to force the dye liquor therethrcu h in one direction and winding up said fa ric with its layers arranged in reverse order, and thereafter subjecting the other'side of the fabric to h drostatic pressure to force the dye liquor through the fabric in the opposite direction.

7. The process of dyeing a fabric which consists in maintaining a bath of dye liquor, forming a mass of a part of a fabric in a plurality of layers a-rran ed adjacent to each other, forming asecon mass of another part of the same fabric with the layers also arranged adjacent to each other, both of said masses of fabric being submerged in said bath, and forcing the liquor of said bath through the masses of fabric simultaneously.

Signed at New York city, N. Y., this 25th day of February 1914.

ALBERT J. RAU.

Witnesses:

Geo. L. WrmELocK, BEATRICE Mmvrs. 

